Question # 1

How many percentage blister copper is pure?

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95%

75%

98%

100%

Water molecule has a structure:

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Ionic

Non polar

Tetrahedral

Polar

Monosaccharides are crystalline solids

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Grey

Crimson

Silver

White

Substitution reaction is the characteristics of.

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Alkanes

Alkenes

Alkynes

None of these

A strange bitter smell noticed near photo copier machine is of.

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H₂S

SO₂

O₂

O₃

Swimming pools are cleaned by a process:

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Hydrogenation

Bromination

Chlorination

Nitration

Global warming causes rising of the sea level. The cause of global warming is.

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CO₂ gas.

SO₂gas.

NO₂gases.

O₃gas.

The carbon contents in lignite is.

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80%

50%

60%

70%

General formula of Alkane is.

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C₁₀H_2n-2

C₆H₂₆

C₁₁H_2n-2

C_nH_2n-2

Glucose and fructose are;

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trioses

tetroses

pentoses

hexoses

Which disease is caused by polluted water.

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Cholera

Typhoid

Diarrhea

All of them

The substances formed during the chemical reaction are called.

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Product

Reactants

Radicals

Element

Ethyne is oxidized by alkaline KMnO₄ then ....... hydroxyl group add to the triple bond.

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Two

Three

Four

Five

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